System, device, method, and computer program and computer program products for providing communicating between devices having similar or dissimilar characteristics and facilitating seamless interoperability between them. Computer program software and methods of and systems and devices for sharing of content, applications, resources and control across similar and dissimilar permanently or intermittently connected electronic devices. Devices, systems, appliances, and the like communicating and/or interoperating within the framework provided. A linear tasking method, model, and system provides alternative to conventional pre-emptive and cooperative threading models used on devices so that multiple operations can be specified and run as if their actions were being executed simultaneously. LinearTasking ensures simple, reliable, flexible and extensibe way for processing units to coordinate their activities in very deterministic and easily tested manner.